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Authors produced rapidly solidified T15 high speed steel powders by high pressure(5~ 6MPa) N_a atomization and liquid N_2 cooling,observed and analyzed the morphology and structure of the powders;at the same time,prepared bulk microcrystalline T15 high speed steel materials by hot extruding or HIPing and hot rolling of the powders,observed and measured the microstructure and performance of the bulk materials.It was shown that rapid solidification may change the solidification characteristics and structure of T15 high speed steel powder and improve the qualities and properties of T15 high speed steel materials.
Authors produced rapidly solidified T15 high speed steel powders by high pressure (5-6 MPa) N_a atomization and liquid N_2 cooling, observed and analyzed the morphology and structure of the powders; at the same time, prepared bulk microcrystalline T15 high speed steel materials by hot extruding or HIPing and hot rolling of the powders, observed and measured the microstructure and performance of the bulk materials. It was shown that rapid solidification characteristics and structure of T15 high speed steel powder and improve the qualities and properties of T15 high speed steel materials.